Firefox plus Sandboxie 5.30 fails to load pages

Alright, I wrote a Question and only found 1 link that's similar but your page won't allow me to paste the link.

1. Using Sandboxie 5.30, Windows 10 64b ver 1903. (Worked fine on ver 1809), 2. Firefox 64b (ver 67.0.3 as well as previous versions) and uBlock Origin, 3. AV = Windows Defender (can't locate any version info) - refuses to load some links or pages. Others often extremely long load times. Firefox alone runs fine. 4. Reproduce? Well, yeah. All day long. Have t-shot FF and obviously the problem is with Sandboxie in conjunction w/latest W10 update. 5. Same in a fresh Sandbox w/defaults. 6. No errors.

I'll delve through the other thread's t-shoot suggestions but hope a solution makes it's way on this Sandboxie support section of Sophos. This is a huge problem for me and I'm sure for many others using FF. What may be confusing is that other thread's titles don't specify what issues, which version, etc.

 

Thank you,

 

Mac