Hi @PhilippRe this is especially true for moving/mobile nodes as there is increased risk of LOS obstruction causing loss of end of what would otherwise be a successful packet Tx. e.g. many GPS Trackers (which likely also Tx other sensor data e.g battery or temp etc.) are on air for 1.3-1.7s @ SF12 and at speeds >100kmph have have traversed ~50-75m tangentially to any receiving GW giving plenty of time/distance to fall into an obstructions shadow. (Note also that for mobile devices esp if moving perpendicular to GW speed of movement - especially higher speeds at higher SF’s - becomes a potential issue due to SIgnal Cohesivity concerns, causing potential packet loss. IIRC whilst SF7 can be resilient to speeds >180kpm, at SF12 speeds as low as 45kph or even ~25kph ‘can’ be a problem!). This can be frustrating in e.g. tracking applications where you typically want to follow a device at significant distance and between GW’s…implying use of higher SF’s - 10, 11 & 12! 
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