restfulapi, deadlock, invalid lock sequence

vdr: [262] --- begin invalid lock sequence report
vdr: [262] 254 - - - - - - - - - - U
vdr: [262] 254 - W - - - - - - - - L
vdr: [262] 254 - * - - W - - - - - L
vdr: [262] 254 - * - - U - - - - - U
vdr: [262] 254 - U - - - - - - - - U
vdr: [262] 248 - W - - - - - - - - L
vdr: [262] 248 - * - - W - - - - - L
vdr: [262] 248 - * - - U - - - - - U
vdr: [262] 248 - U - - - - - - - - U
vdr: [262] 254 - W - - - - - - - - L
vdr: [262] 254 - * - - W - - - - - L
vdr: [262] 254 - * - - U - - - - - U
vdr: [262] 254 - U - - - - - - - - U
vdr: [262] 262 - R - - - - - - - - L
vdr: [262] 262 - * - - - - - - - - L
vdr: [262] 262 - * - - - - - - - - U
vdr: [262] 262 - * - - R - - - - - L
vdr: [262] 262 - * - - * - - - - - L
vdr: [262] 262 - * - - * - - - - - U
vdr: [262] 262 R * - - * - - - - - L
vdr: [262] 262 invalid lock sequence: 1 Timers
vdr: [262] full backtrace: invalid lock sequence at So. 13.08. 16:03
vdr: [262] /opt/vdr-2.3.8/vdr cStateLock::Lock(cStateKey&, bool, int) at thread.c:734
vdr: [262] /opt/vdr-2.3.8/vdr cTimers::GetTimersRead(cStateKey&, int) at timers.c:822
vdr: [262] /opt/vdr-2.3.8/PLUGINS/lib/libvdr-restfulapi.so.2.3.8 VdrExtension::TimerExists(cEvent const*) calling cTimers_Lock at timers.h:221 at VdrExtension::TimerExists(cEvent const*) at tools.cpp:834
vdr: [262] /opt/vdr-2.3.8/PLUGINS/lib/libvdr-restfulapi.so.2.3.8 JsonEventList::addEvent(cEvent const*) at events.cpp:501
vdr: [262] /opt/vdr-2.3.8/PLUGINS/lib/libvdr-restfulapi.so.2.3.8 EventsResponder::replyEvents(std::ostream&, cxxtools::http::Request&, cxxtools::http::Reply&) at events.cpp:138
vdr: [262] /opt/vdr-2.3.8/PLUGINS/lib/libvdr-restfulapi.so.2.3.8 EventsResponder::reply(std::ostream&, cxxtools::http::Request&, cxxtools::http::Reply&) at events.cpp:27
vdr: [262] /usr/lib/libcxxtools-http.so.9 cxxtools::http::Socket::doReply() at ??:?
vdr: [262] /usr/lib/libcxxtools-http.so.9 cxxtools::http::Socket::onInput(cxxtools::StreamBuffer&) at ??:?
vdr: [262] /usr/lib/libcxxtools-http.so.9 cxxtools::http::Worker::run() at ??:?
vdr: [262] /usr/lib/libcxxtools.so.9 at ??:?
vdr: [262] /lib/x86_64-linux-gnu/libpthread.so.0 at ??:?
vdr: [262] /lib/x86_64-linux-gnu/libc.so.6 clone at ??:?
vdr: [262] --- end invalid lock sequence report
vdr: [262] --- THERE WILL BE NO FURTHER REPORTS UNTIL VDR IS RESTARTED!