Cannot re-submit low gasprice tx from Fortmatic

**Describe the bug**
I am trying to setup a privacy-respecting profile. As such I am using TailsOS with the Tor browser. That means I cannot use Metamask and most other wallets. The only wallet that I seem to be able to use is Fortmatic. Unfortunately, Formatic just created a tx with a super low gas price of 5GWei.
https://etherscan.io/tx/0x883e949726365001266463ead530376e5addac9a59f2bb61fc71e8120452f416

It does not seem to be able to re-submit the transaction. I exported the JSON key and tried using that with MyCrypto legacy but cannot modify the nonce so I cannot even manually re-submit the tx.

**Expected behavior**
I expected that after e.g. 30min I can re-submit a tx with the same nonce through Fortmatic.

**Desktop (please complete the following information):**
- OS: TailsOS
- Browser: Tor Browser
- Browser Version: 10.5.6 (based on Mozilla Firefox 78.14.0esr) (64-bit)