I'm having the same issues. Reinstalled graphic drivers, dropped graphic settings down to low. I just ran squadron missions so as not to inflict myself on the community and it was miserable.

Platform? (Steam/Windows/PS4/PS5/Mac etc.) Windows
Have you tried using a wired connection? I always play on a wired connection.
Internet Service Provider: Cox
Region/Location: (your actual region not in game) Southern California, San Diego specifically
Separate Modem and Router or Hybrid? Separate
Are you using a Firewall/Anti-virus solution? If so, which ones? Windows Defender
Does the issue only happen with specific characters or all characters? Both characters. One just checking marketboard and my alt redoing msq.