I'm not convinced any more that a lot of coats of TT is good. Nor any heavy coats.
After a "ink melting" disaster on one BG using TT with a somewhat normal slow first coat I have switched to a light quick mist for the first coat.
After dry I add another light coat at 90 degrees orientation.

Just a light spray sealing job is all I do now.
Your problem may have been some puddling of TT in areas that did some ink melting.
Some ink is more robust than others, you can't tell beforehand. Just after you mess it up!

Alan