@haeckerfelix there are (or used to be) anti-static sprays and you could put that on fabric to reduce static on the fabric. Grounding metal frame may help, but if probem is between fabric and your own body, then grounding metal frame may not do much.
@jfmezei @haeckerfelix
Many suspect the gas lift piston found in many office chairs. If so, anti-static fabric sprays might not help. Adding ferrite cores to the display cables has been suggested
https://support.displaylink.com/knowledgebase/articles/738618-display-intermittently-blanking-flickering-or-los