diff --git a/reactor-plc/startup.lua b/reactor-plc/startup.lua
index 0c8022f..66435d9 100644
--- a/reactor-plc/startup.lua
+++ b/reactor-plc/startup.lua
@@ -19,7 +19,7 @@ local plc      = require("reactor-plc.plc")
 local renderer = require("reactor-plc.renderer")
 local threads  = require("reactor-plc.threads")
 
-local R_PLC_VERSION = "v1.5.5"
+local R_PLC_VERSION = "v1.5.6"
 
 local println = util.println
 local println_ts = util.println_ts
diff --git a/reactor-plc/threads.lua b/reactor-plc/threads.lua
index 10634ef..12ae75a 100644
--- a/reactor-plc/threads.lua
+++ b/reactor-plc/threads.lua
@@ -165,7 +165,7 @@ function threads.thread__main(smem, init)
                 local type, device = ppm.handle_unmount(param1)
 
                 if type ~= nil and device ~= nil then
-                    if type == "fissionReactorLogicAdapter" then
+                    if device == plc_dev.reactor then
                         println_ts("reactor disconnected!")
                         log.error("reactor logic adapter disconnected")
 
@@ -205,7 +205,7 @@ function threads.thread__main(smem, init)
                 local type, device = ppm.mount(param1)
 
                 if type ~= nil and device ~= nil then
-                    if type == "fissionReactorLogicAdapter" then
+                    if plc_state.no_reactor and (type == "fissionReactorLogicAdapter") then
                         -- reconnected reactor
                         plc_dev.reactor = device
                         plc_state.no_reactor = false