Title tag incorrect in Bing only

Quick SEO question. I have a Webflow site with an ‘Upgrade your Browser’ message that only displays to visitors using IE via custom code. All works great but I’ve noticed the text ‘Please Upgrade Your Browser’ is getting displayed as a Title when I search for the site in Bing. This is not the case in Google. You can see from the screenshot below. The sentence “Please upgrade…” was initially set as a H2 title (which I’ve now turned off) - would that be the issue?