Extremely slow opening internal site

OK, I have internal sites that just spin and spin. Pages that load instantly with Firefox but I have been waiting literally 2 minutes with Brave. Brave shields are down for the internal site and the message at the bottom of the window says “Waiting for xxxx.com …” Again, same computer, same time, it opens almost instantly with Firefox.

I do have about multiple Brave windows open with about 30 tabs open (sometimes I may have 50 tabs between all the windows open)

Windows 10 Pro
Intel Core i7-7700K @ 4.20 GHz
64.0 GB Ram
SSD disks

I am hoping it is just a setting that I can change as I really want to stay on Brave but this performance is killing me and my desire to stick with it.

TIA!

PS. The internal server is using IIS …