Intermittent SSL issue on myndex.com

[TheGlenn88]

Does this relate to a web app or tool (i.e. you're an end user) OR is this about code or code integration (you're a developer).
Web app

Describe the bug
When visiting https://www.myndex.com/APCA/?BG=023e1f&TXT=509d75&DEV=G4g&BUF=A22 sometimes this results in an invalid response (see screenshot)

To Reproduce
This happened the first time i visited the URL in chrome. then it started working consistently. I tried opening an Incognito window and it happened again.

Expected behavior
No SSL issues.

Screenshots

System or device information (please complete the following):

• Device: Macbook Pro M1
• OS: MacOS
• OS version: Sonoma 14.5
• Browser: Chrome
• Version: 127

[TheGlenn88]

Another observation I've just made is visiting:

http://www.myndex.com/APCA/?BG=023e1f&TXT=509d75&DEV=G4g&BUF=A22 (HTTP)

Results in the page loading via HTTP, this could be intentional, but usually people redirect to HTTPS, thought it was worth mentioning.