My website doesn't load on Chrome normal but loads in Incognito - but same issue for other users

I've been pulling my hair out for a week trying to get this fixed. Its very hard to reliably replicate the issue, but here goes!

My website won't load on 'normal' chrome, but will load sometimes in Incognito. Ok, fine - disable all extensions and clear cache (similar issue to this Webpage displayed in Incognito, not in regular Chrome)

I have done all of that - but it still doesn't load AND other users from around the world are having the same issue trying to load my site: https://nightrideband.com

People seem to be able to access it once, but then it won't load a second time for them. Almost like there is something seriously wrong with how my WP site is telling browsers to Cache? I host with TrulyWP (a fairly new hosting provider) and use their platform caching thing - I have also tried to disable that. I also tried using their CDN service but that hasn't worked either.

Its so random! I even tried doing some GTMetrix reports, https://gtmetrix.com/?job_error=yJET1gcI (https://nightrideband.com/ fail) https://gtmetrix.com/reports/www.nightrideband.co.uk/6pT83dLQ - adding www. seems to work sometimes.

I think my DNS settings are ok enter image description here enter image description here

Can anyone help me please?

thank you so much!