Hey, I just got approved in JKT a few days ago. It took me 5 days only. My 500k is only shown within 1 month not the entire 3 months. From what I can share with you, as long as you have a legit document from your remote work as the following:
1. Your company issued you an employment certificate in which it says they endorse you to stay and work remotely in thailand
2. Company registration document/certificate legal verification
3. Salary slip 3-6 months that you can also shown in your bank statement, they are sent to you with correct numbers
If you have all the above, the 500k thb wont be required to stay in 3 months. Let me know if you need more details