Pipe Fittings Disappearing

[Anonymous]

Pipe fittings randomly disappear. The fittings that disappear are usually elbows and tees and are always (99% sure) off screen (ASME pipes and fittings catalog components), however no component is safe from this issue (flanges, valves, custom components,etc.). Also, there doesn't seem to be a pattern to this -- one elbow may disappear but an identical elbow next to it will not. These fittings can be selected if you click where they should be or draw a selection window around them. The only way to get them to reappear is to save the drawing. Does anyone have any idea why this may be happening? I've already messed around with hardware acceleration (on/off/different settings) and it seems to have no effect on this issue.

Attached are 3 screenshots:

Missing Fittings.PNG - shows invisible tees and elbows

selected.PNG - shows these invisible fittings selected

After Save.PNG - shows the fittings visible right after a save

Thanks for any and all help!

Processor: Intel Core i7 6700k 4.0GHz ::: Motherboard: ASUS Z170-K ::: System Memory: 32GB DDR4 2666MHz ::: Power Supply: 600W EVGA ::: Graphics Card: NVIDIA Quadro M4000 8 GB

[rdoonanAR5XP]

I don't know why this is marked as solved. This is a recurring issue for me and none of the solutions in this post worked for me. I am repeatedly having to redo every valve in an entire model.