I was able to reproduce this now - but it seems like a Chrome bug...
When using html-form-elements like <select> or <input> inside another html-element that listens to touch events (like a krpano <layer> element does), then these form-elements don't work anymore... even when nothing will be done with the touch-events...
But after some trying I've found a workaround - when there are touch-events inside a layer on 'form-elements', then these touch-events on them will be captured and canceled and instead artificial mouse-events will be sent to the form-elements. And with these 'mouse'- instead of 'touch'-events the form-elements are working as expected.
That workaround will be included in the next krpano release.
Best regards,
Klaus