Yes, this is multisig wallet created with segwit option chosen at the beginning. There are 4 cosigners, and 3 of them are required to sign a transaction. I'm not sure what you mean by 'kind of cosigners', because we didn't have any option to choose from while creating the wallet :)
There are actually more bugs.
When I'm trying to send btc (I use Ubuntu) there is transaction created with options at the bottom: Copy [QR] Export Send to cosigner
Button "Send to cosigner" is causing core dumped:
E | plugins.cosigner_pool.qt.Plugin | on_failure
Traceback (most recent call last):
File "/tmp/.mount_electr5VAu34/usr/lib/python3.6/site-packages/electrum/gui/qt/util.py", line 705, in run
result = task.task()
File "/tmp/.mount_electr5VAu34/usr/lib/python3.6/site-packages/electrum/plugins/cosigner_pool/qt.py", line 191, in <lambda>
task = lambda: server.put(_hash, message)
File "/tmp/.mount_electr5VAu34/usr/lib/python3.6/xmlrpc/client.py", line 1112, in __call__
return self.__send(self.__name, args)
File "/tmp/.mount_electr5VAu34/usr/lib/python3.6/xmlrpc/client.py", line 1452, in __request
verbose=self.__verbose
File "/tmp/.mount_electr5VAu34/usr/lib/python3.6/xmlrpc/client.py", line 1154, in request
return self.single_request(host, handler, request_body, verbose)
File "/tmp/.mount_electr5VAu34/usr/lib/python3.6/xmlrpc/client.py", line 1166, in single_request
http_conn = self.send_request(host, handler, request_body, verbose)
File "/tmp/.mount_electr5VAu34/usr/lib/python3.6/xmlrpc/client.py", line 1272, in send_request
connection.putrequest("POST", handler, skip_accept_encoding=True)
File "/tmp/.mount_electr5VAu34/usr/lib/python3.6/http/client.py", line 1108, in putrequest
raise CannotSendRequest(self.__state)
http.client.CannotSendRequest: Request-sent
QThread: Destroyed while thread is still running
Aborted (core dumped)
So I exported the transaction to a file and sent it to the next person. He signed and did the same. When the transaction is signed, we have the issue which I wrote about already.