[#3870] BUG 7.50 Unable to set custom Funds For Station Construction

[phenomenalbeaver]

Version 7.50, English, online features at 1.24 and logged in but I've no idea what it does or how to turn it on so I think it doesn't apply.
Curs start: Stranded, unmodified, started on 7.50 after completing Timelines, added the online thing midway.

Estimate for station construction is terrible so I tried to manually overbudget by dragging the slider to an excessive sum and hitting Confirm.
In both the Build Planner screen, and in the Info tab in the map this results in funds returning into the player account "1 economic tick" later (slider/value stays up indefinitely until game is unpaused and then the time to reset is inconsistent). The slider goes back to the previous value (not to Estimate).
Game and saves folder are excluded from Windows Defender.
Game is running (perfectly fine) under Mandatory ASLR. Not quite sure how to test whether disabling MASLR for this exe leads to a better outcome. I have tested that disabling MASLR doesn't stop the problem for occurring in the current save. I've also disabled MASLR for X4 going forward.

Setting the station construction fund does work correctly from the different looking slider in Player Information->Account Management page and then it also seems to fix the issue for the Info and Build sliders. Unsure how long the fix persists for, but it survived a reload. Sadly it was a quicksave and i didn't expect this to happen so I can't send the diff.

Applies to both of the stations with active builds in the save, it's also applied to HQ before ( and after ), but atm that doesn't have active construction and I don't want to mess up my autosaves rn. I'm guessing it's an interface issue and doesn't depend on the station anyway.

https://1drv.ms/f/c/967b127cf7155671/Eu ... w?e=yg6ALA

Quick question: Why does the save have a version history through 6.20? I'm positive that I started this save on 7.50, it's been a very long time since I've used 6.20.