I’ve seen this on my own device (author of the docs site here) but after a force quit and restart of safari was not able to reproduce.
Would you mind if I asked a few questions?
- does your device have remote debugging enabled on Safari?
- was your phone in low-power mode?
- did you first access the site through a WebKit in-app browser panel before opening it Safari?
- what version of iOS?
- what model of iPhone?
Those are my leading theories for what contributes to the flash happening. If you force quit and restart safari and / or reboot your phone does it work as expected?
Would you mind if I asked a few questions?
- does your device have remote debugging enabled on Safari?
- was your phone in low-power mode?
- did you first access the site through a WebKit in-app browser panel before opening it Safari?
- what version of iOS?
- what model of iPhone?
Those are my leading theories for what contributes to the flash happening. If you force quit and restart safari and / or reboot your phone does it work as expected?