Block time is incorrect if mining interval is less than 1

Prerequisites

[X] I am running the latest fetchd version.
[X] I checked the documentation and found no answer to my problem.
[X] I checked the existing issues to make sure my problem has not already been reported.

Expected Behavior

I expect the block.time.seconds() to go up about 1 every second

Current Behavior

If I run the node replacing 5 in the timeout_commit config with 0.25, then time rises about twice as quickly as realtime in the contracts. My initialisation script does this: sed -i 's/timeout_commit = "5s"/timeout_commit = "0.25s"/g' ~/.fetchd/config/config.toml

prior to calling fetchd start

I then ran a python script which every second queried a contract which returned the block.time. This is the table:

Rust: env.block.time.seconds(), Python time.time()
0.0, 0.0
3.0. 1.0
5.0, 2.0
7.0. 3.0
9.0. 4.0
11.0, 5.0
13.0, 6.0
15.0, 7.0
17.0, 8.0
19.0, 9.0

You can see that the contract time rises about twice as fast as the realtime (measured in python).

This is only an issue when the timeout_commit time is < 1. However, this is kind of crucial for us otherwise development becomes impossibly slow.

To Reproduce

Talk to Diarmid and I can point you to code.

Context

OSX Fetchd version (docker image) image: fetchai/fetchd:0.9.0-rc4

Failure Logs

No response

fetchai / fetchd