TKB Home TZ37 slows down Z-Wave network

[ThaDuck]

Since I included a TKB Home TZ37 Wallmounted switch my Z-Wave network is really slow. In the past it took about 1-2 seconds before commands were received by my devices, but with the TZ37 included it takes up to 30 seconds.

The first inclusion of the TZ37 was smooth, but the device was recognized as 'Unknown'. I have changed the specifications.xml so the correct name was displayed after a new inclusion. In both situation the network became slow.

Are there any steps I can take to get it back on track? Network heal is running every night and the network looks fine.

Maybe there is an option to disable the relay on a device? I do not need to use it as a relay, I have more then enough devices in range.

[ThaDuck]

Spend some time on this, found out that the device is constatly complaining about timeouts:

2017-05-09 22:57:14.497 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:57:36.437 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:57:46.438 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:57:56.447 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:58:06.448 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:58:16.449 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:58:26.450 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:58:36.451 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:59:08.398 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:59:18.425 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:59:28.452 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:59:38.478 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:59:48.479 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 22:59:58.487 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 23:00:08.488 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 23:00:18.705 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 23:00:28.706 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)
2017-05-09 23:00:38.706 OpenZWave: Received timeout notification from HomeID: 3995678686, NodeID: 23 (0x17)

Tried to set polling active, heal the network, exclude and include, all without luck...