"copy payload: payload size overflow" in EC container

[roman-khimov]

Expected Behavior

Green EC tests.

Current Behavior

Sometimes this happens:

/neofs-cli --config /Users/runner/work/neofs-testcases/neofs-testcases/neofs-testcases/wallet_config.yml object get --rpc-endpoint 'localhost:20007' --wallet '/Users/runner/work/neofs-testcases/neofs-testcases/neofs-testcases/test-run-2026-09-03-15-16-43-742042-master-1819/wallet-b95d5a4b-8cc3-4b26-bb12-b117705ef4c9.json' --cid '7zxnrfk8j7EE9D8qXDjGxigqkhzna4fSCh2YucrVwmkm' --oid 'H5X8UgbHoivuDj5G21kowvCRcncF1anwoJjmF3mASW6J' --file '/Users/runner/work/neofs-testcases/neofs-testcases/neofs-testcases/test-run-2026-09-03-15-16-43-742042-master-1819/TestObjectsDir/9a063254-cde4-4df6-871a-aa427745c097' --no-progress
Error:
return code: 1
output: Error: rpc error: copy payload: payload size overflow

https://rest.fs.neo.org/Aku38wpn2xEqfEPxmwyAa7N3VnAkMV8PEVkpLqwKM1z3/1974-1788460451/index.html#suites/984714965e4ceb59769fd7bfd04d106f/206e919b20082b71/

Possible Solution

Fix something.

Steps to Reproduce (for bugs)

Can happen in testcases.

Regression

Maybe.

Your Environment

• Version used: 0.56.0
• Server setup and configuration: testcases
• Operating System and version (uname -a): ubuntu-latest

[roman-khimov]

One more: https://rest.fs.neo.org/Aku38wpn2xEqfEPxmwyAa7N3VnAkMV8PEVkpLqwKM1z3/1989-1788857495/index.html#suites/984714965e4ceb59769fd7bfd04d106f/12d4a6be442c18aa/

[roman-khimov]

https://rest.fs.neo.org/Aku38wpn2xEqfEPxmwyAa7N3VnAkMV8PEVkpLqwKM1z3/5952-1788900799/index.html#suites/984714965e4ceb59769fd7bfd04d106f/fb35446230010797/

[roman-khimov]

https://rest.fs.neo.org/Aku38wpn2xEqfEPxmwyAa7N3VnAkMV8PEVkpLqwKM1z3/2000-1789092614/index.html#suites/984714965e4ceb59769fd7bfd04d106f/cc5410fe5f0f5e74/

[roman-khimov]

MacOS, 0.56.0: https://rest.fs.neo.org/Aku38wpn2xEqfEPxmwyAa7N3VnAkMV8PEVkpLqwKM1z3/2003-1789115607/index.html#suites/984714965e4ceb59769fd7bfd04d106f/491266d0e6a7c3cd/

[roman-khimov]

Ubuntu, master: https://rest.fs.neo.org/Aku38wpn2xEqfEPxmwyAa7N3VnAkMV8PEVkpLqwKM1z3/5976-1789125204/index.html#suites/984714965e4ceb59769fd7bfd04d106f/3da81a946cea3d45/