Glitch when too many tileschanged in one room 4.1.5

[mouse spirit]

Mainly, when I have a room of death tiles, and deathtile breaker armor on( which simply ignores deathtile killing me and changes deathtile to null 00 walkable.)

All that works fine. No slowdown,the code is simple and short other than changetile code.

BUT when I do so many in a given room , an invisible 4 block tall wall "appears".
Sometimes 2 of them.

I only notice because it stops my bullets.
Doesn't stop my character or do much else as far as I can tell.

But if I do more deathtile breaking, the wall either moves or disappears.

I want this not to happen, and so am asking for advice as to why it happens.

As far as my debugging, it's not changing those tiles into a certain tile type like onewayblock or solid or deathtile. But I don't know what's going on and will post a gif of it later. When I am at my laptop. That may help.



Its more of a thin line...
I think its position may be based on the
one i touch that sets it off.Like if i touch
a different deathtile when it starts, it will be in
a different spot.

 

[mouse spirit]

I did more testing. It's not a tile type issue as fa as i can see.
I made a scenario where it would happen over top
of existing tiles that I could easily test.
The tiles still worked as intended, but had this glitch present still.
Meaning its got to be something else kinda.
Hopefully someone understands.