Submitted by 0x1f8b, also found by rfa, berndartmueller, BowTiedWardens, csanuragjain, Lambda, neumo, and StErMi
Note: issues #283, 115, 82, 89, 61, and 241 were originally broken out as a separate medium issue. Approximately 1 week after judging and awarding were finalized, the judging team re-assessed that these should have all been grouped under H-03. Accordingly, the 6 warden names have been added as submitters above.
https://github.com/code-423n4/2022-06-yieldy/blob/34774d3f5e9275978621fd20af4fe466d195a88b/src/contracts/BatchRequests.sol#L93
https://github.com/code-423n4/2022-06-yieldy/blob/34774d3f5e9275978621fd20af4fe466d195a88b/src/contracts/BatchRequests.sol#L57
https://github.com/code-423n4/2022-06-yieldy/blob/34774d3f5e9275978621fd20af4fe466d195a88b/src/contracts/BatchRequests.sol#L37
The BatchRequests.removeAddress logic is wrong and it will produce a denial of service.
Removing the element from the array is done using the delete statement, but this is not the proper way to remove an entry from an array, it will just set that position to address(0).
Append dummy data:
Remove address:
Service is denied because it will try to call canBatchContracts  to address(0).
0xean (Yieldy) confirmed and resolved 
JasoonS (judge) commented:
