yep, could be husbandry. so double-check your temps, humidity, hides/security, etc. it doesn't look like u cover up any tank glass with paper or whatever.
so if husbandry is all good, he could just be trying to escape. since air is coming in through the mesh top, he might be up there thinking there's a way out. also they will climb if u give them the means to do so (grapevine, decorative decor, etc). my Elphie enjoyed climbing her lil tree until she outgrew it:
i think it's fine that they climb just as long as they return to the ground and hides by themselves when the time is right.
Edit: lol it's so fun to look back at my 1st tank setup. i improved it by adding clutter and covered the glass. she still liked to climb tho.
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