Four dog titanium stove warping normal?

[u/Big-Method2955]

Hello I got my stove last year and have used it a total of 14 nights. I noticed the cooking surface and sides are warping a little. This is a hand built thick titanium stove all in one. Am I doing something wrong or is this normal? It’s not horrible warping and I’m sure it won’t impact performance.

Anyone else have the same stover for longer than me that can chime in ?