Thanks for the details! So if I understand correctly, this issue occurs consistently in one of your saves, but doesn't happen when you start a new one? I wander if it has something to do with gaining progress for hyperspace topography by going fast, but only activates at a certain stage. Hmm...
That is correct. It occurs every time the ability is used in hyperspace for the duration. I have a habit of modding my games pretty heavily, so I'll post all the settings I modded that I think could impact performance below.
"campaignMaxPan":2000, # MODIFIED FROM 800
"campaignRadarRadius":12000, # MODIFIED from 6000
"maxCampaignZoom":6.0, # MODIFIED FROM 3 zoomed out all the way
"campaignSpeedupMult":2, # MODIFIED FROM 2 and currently default
"speedPerBurnLevel":20, # MODIFIED from BUT BACK TO 20 - speed per max burn level, in units (pixels) per real-time second (10 sec/day)
The two settings I thought could be the issue were speedPerBurnLevel and campaignSpeedMult, so I set both of those back to default, but it did not make a difference. I also tried adjusting all the other settings listed back to default, and it didn't make a difference. In my opinion, it has to be something saved in the save file.