I experience moments like that, and it can be caused by stress, anxiety, drugs, trauma, other MI.

It sounds to be like derealism/depersonalization in the dissociative spectrum. Mine are triggered from sensory overload, anxiety, stress.

If it does bother you I would consult my mental health care providers.

I'm used to it, I usually look at it as a free show and wait for it to pass, or do grounding techniques to comeback.

I hope that helps.