Hi @attilaszabo,
Problem is I tried really hard to find the pattern to reproduce the issues (and to report it, and to avoid it), problem is i do not really found the pattern to reproduce the issue just when this happen, this happen like previus to 2019.2.
-> For MXS, that's more easy : ALWAYS
->for CTRL+N calculator : ALWAYS too
->For reset , it happen very randomly (sometime never on a day/week, sometime it will happen every time i reset on a day until I fresh restart 3dsMAX (for material editor, or merging or reset, restarting 3dsMAX will make 3dsMAX behaviour return to 'normal' everytime)…
Note : it never happen when opening a scene file, just 'File/reset'
Note #2 : I just try to avoid to File Reset 3dsMAX now.
For material editor, i only use slate, since it was release, so , yes it happen to me on slate material editor...always when entering value on keyboard on a float spinner of the material, but could happen at any time, on any material, completly random but when this happen, you will not be able to enter a value, until one is accepted (and always using dot, with some decimal value), when a value is accepted, the behaviour return to normal (yeah, that's weird)...
I mainly use Vray in production since few month, so when i tweak a material, when the issue appear, most of the time, since I'm tweaking material when the problem happen, I have vray IPR turn ON too. (but not always)
->Note : closing slate material editor, then reopening it, fix the behaviour.
For merging, this happen ONLY when i try to merge part of file coming from 3dsMAX 2016 or previous… (and not always, as most of those issue, that's completly random when this happen, so it's really hard to isolate)...
For reset, I have to admit this made 2 weeks i did not have any issue, (but no max update during this period, so i'm probably just lucky), but when this happen 3dsMAX just react like previous to 2019.2 fix...
Restarting 3dsMAX 2019.2 will make 3dsMAX return to normal behavior.(since .3 is too fresh to complain about merging/reset/material editor issue, but calculator and MXS are still there and a lot of message, progress still displaying ',' instead of a dot for decimal value, so something tell me nothing really change).
With time I just avoid to use 'reset' (close max, reopen it), and when this happen, save my file, close 3dsMAX, then reopen it...
But Like i'm telling upper, calculator/MXS 'Tool | Edit rollout' always facing the issue (100% reproductible, just test it)...and a lot of message or progress, still using coma instead of dot, so it's not completly fix inside 3dsMAX (this on 2018.4 or previous version, with all update installed, will NEVER happen)
-> Exemple of 'message using coma instead of dot :
File Size on Cache thinckingParticle
Memory used (P & V) on render progress dialog (no matter the renderer, sometime it switch from dot to coma to dot to coma)-> scanline, Vray, quicksilver, ART, finalRender 4, Arnold for sure.
that's just message feedback message, so it's ok for those one but this show this is not well fixed inside 2019 (2018 and previous, again, do NOT do this)
If this happen on a FumeFX console during simulation, it will crash 3dsMAX2019 to desktop (specially visible with 'old' FFX5.0.1 since you will crash to desktop really quickly due to this (same on 2018 will be ok), this happen less (near never, but this happen to me one time), with 5.0.2)--> so even third party are affected, even if you are using windows settings
(ok this one was too easy, my apologies)
Exr meta data (extra infos ) could be affected too.
etc.etc.
Just try to compare decimal separator on a modified regional setting system between max2018.4 and 2019.3, you will see differences 🙂
When this will happen to me next time, i will try to record screen, but when this behavior happen , that's more than annoying
My 2 cents : but I seriously doubt about having option to use coma rule (coma decimal separator, semilicon list separator, semilicon too as 'end-of-code' separator), this is just non sens , since it give two rules on max side (MXS/Python/OSL use dot rule, most of 'non AD' package force to use dot rule, export file use dot rule, Bat/batch/cmd use dot rule, powershell use dot rule, expression technique use dot rule, coma rule for just GUI is just non sens...it break user experience, not even talking about pain to have it working properly this year 🙂 )