diff --git a/coordinator/startup.lua b/coordinator/startup.lua
index e8717c4..83a445d 100644
--- a/coordinator/startup.lua
+++ b/coordinator/startup.lua
@@ -16,7 +16,7 @@ local config       = require("coordinator.config")
 local coordinator  = require("coordinator.coordinator")
 local renderer     = require("coordinator.renderer")
 
-local COORDINATOR_VERSION = "alpha-v0.5.10"
+local COORDINATOR_VERSION = "alpha-v0.5.11"
 
 local print = util.print
 local println = util.println
diff --git a/scada-common/tcallbackdsp.lua b/scada-common/tcallbackdsp.lua
index 339d1b5..98d9b6f 100644
--- a/scada-common/tcallbackdsp.lua
+++ b/scada-common/tcallbackdsp.lua
@@ -9,7 +9,10 @@ local tcallbackdsp = {}
 
 local registry = {}
 
-local UNSERVICED_CALL_DELAY = util.TICK_TIME_S
+---@todo possibly move this to a config file?
+-- maximum 5 ticks late (0.25 seconds)<br/>
+-- heavily modded servers and large multiplayer servers tend to significantly slow tick times, so nominal 0.05s ticks are unlikely
+local UNSERVICED_CALL_DELAY = util.TICK_TIME_S * 5
 
 -- request a function to be called after the specified time
 ---@param time number seconds