Extension window becomes blank on dApps with Keystone accounts

[onsails]

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Describe the bug On Gnosis Safe (https://safe.global), BlockWallet extension window turns blank randomly on signing attempts on Keystone accounts.

To Reproduce Steps to reproduce the behavior:

1. Create Keystone account in BlockWallet
2. Go to https://safe.global, create a safe, wait for creation, top it up with some tokens tradeable on uniswap.
3. Go to Apps -> Uniswap (in safe interface)
4. Swap tokens
5. Repeat multiple times (3-5 should be enough) to see BlockWallet turning blank upon safe requesting a signature from BlockWallet.

Expected behavior BlockWallet shows signing interface

Desktop (please complete the following information):

• OS: macOS
• Browser Brave
• Version 1.2.8

Additional context Another thing with Keystone accounts is that it transaction QR animates pretty slow, making scanning from keystone slow as well. I would recommend to take a look at Rabby wallet as a reference – it QR animation is pretty fast and keystone device handles it perfectly.

[onsails]

It keeps happening in any dApp which flow requires multiple txs or off-chain signatures in a short period of time.