https://www.youtube.com/watch?v=_V6Zkia9iz4

The basic timeline of events in this clip:

I have Avacyn, Angel of Hope on the field. It is indestructible and has an ability that makes all of my other permanents indestructible

My opponent plays Curious Colossus, which on entry removes all abilities from my creatures, including Avacyn. All my permanents lose the indestructible marker and styling that Avacyn gave them.

I play Fall of the Thran which destroys all lands - including mine; they are not indestructible anymore

I activate the -4 loyalty ability of The Eternal Wanderer which sacs all creatures except Avacyn and an unrelated creature - this exiles Curious Colossus

At this point, Avacyn still has no abilities, as expected. However here all my other permanents regain their indestructible text and styling from Avacyn

I could be missing something, but I believe it may be a bug that my other permanents regained indestructible when Curious Colossus left the field